<!doctype html>
<html ng-app>
    <head>
    	<meta charset="utf-8" />
        <script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
    </head>
    <body>
    	<input ng-model="name"  placeholder="delan" type="text" ng-init="name='delan'"/>
        Hello {{name || "liujq"}}!
        
        <p>姓名为 :<span ng-bind="name"></span></p>
    </body>
</html>